| 29-1 Term | 29-1 Definition |
| nuclear fusion | the process by which nuclei of small atoms combine to form a new, more massive nucleus; the process releases energy |
| radiative zone | the region of the sun’s interior in which energy moves through waves or particles |
| convective zone | the region of the sun’s interior in which energy is carried upward by circulation of matter |
| photosphere | the visible surface of the sun |
| chromosphere | thin layer of the sun that glows a reddish color during eclipses |
| corona | the outermost layer of the sun’s atmosphere |
| spectrograph | device that breaks up light into a spectrum |
| spectrum | the complete range of colors in the rainbow, from short wavelengths (blue) to long wavelengths (red) |
| core | the center of the sun |
| solar wind | the flow of electrically-charged particles from the sun into the rest of the solar system |
| ions | electrically charged particles |
